<template>
  <div class="upload-file">
    <el-row>
      <el-col :span="4">
        <el-upload
          :multiple="multiple"
          :action="uploadFileUrl"
          :before-upload="handleBeforeUpload"
          :file-list="fileList"
          :limit="limit"
          :on-error="handleUploadError"
          :on-exceed="handleExceed"
          :on-success="handleUploadSuccess"
          :show-file-list="false"
          :headers="headers"
          class="upload-file-uploader"
          ref="fileUpload"
        >
          <!-- 上传按钮 -->
          <el-button type="primary" :disabled="disabled">{{
            uploadButtonName
          }}</el-button>
        </el-upload>
      </el-col>
      <el-col :span="20" v-if="directoryInputShow">
        <el-input
          v-model="fileName"
          @input="fileNameInput"
          placeholder="材料名称，可以修改；默认取第一个附件名称"
        />
      </el-col>
      <!-- 上传提示 -->
      <div class="el-upload__tip" v-if="showTip">
        请上传
        <template v-if="fileSize">
          大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
        </template>
        <!-- <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template> -->
        的文件
      </div>
    </el-row>

    <!-- 文件列表 -->
    <transition-group
      class="upload-file-list el-upload-list el-upload-list--text"
      name="el-fade-in-linear"
      tag="ul"
    >
      <li
        :key="file.uid"
        class="el-upload-list__item ele-upload-list__item-content"
        v-for="(file, index) in fileList"
      >
        <el-link :href="`${file.url}`" :underline="false" target="_blank">
          <!-- <span class="el-icon-document"> {{ getFileName(file.originalName) }} </span> -->
          <span class="el-icon-document"> {{ file.originalName }} </span>
        </el-link>
        <div class="ele-upload-list__item-content-action">
          <el-link
            :disabled="disabled"
            :underline="false"
            @click="handleDelete(index)"
            type="danger"
            >删除</el-link
          >
        </div>
      </li>
    </transition-group>
  </div>
</template>

<script setup>
import { getToken } from "@/utils/auth";
import { listByIds, delOss } from "@/api/system/oss";

const props = defineProps({
  modelValue: [String, Object, Array],
  // 数量限制
  limit: {
    type: Number,
    default: 1,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 200,
  },
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: {
    type: Array,
    default: () => [
      "doc",
      "docx",
      "xls",
      "xlsx",
      "ppt",
      "txt",
      "pdf",
      "png",
      "jpg",
      "jpeg",
    ],
  },
  // 不包含的文件类型
  excludeFileType: {
    type: Array,
    default: () => ["js", "html", "htm", "java", "py"],
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true,
  },
  multiple: {
    type: Boolean,
    default: false,
  },
  //禁用
  disabled: {
    type: Boolean,
    default: false,
  },
  //上传按钮名称
  uploadButtonName: {
    type: String,
    default: "选取文件",
  },
  //禁用名录文件名称输入框显示
  directoryInputShow: {
    type: Boolean,
    default: false,
  },
  //禁用名录文件名称修改
  materialName: {
    type: String,
    default: "",
  },
});

const { proxy } = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const baseUrl = import.meta.env.VITE_APP_BASE_API;
const uploadFileUrl = ref(baseUrl + "/system/file/upload"); // 上传文件服务器地址
const headers = ref({ Authorization: "Bearer " + getToken() });
const fileList = ref([]);
const fileName = ref(""); //文件名称
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
);

watch(
  () => props.modelValue,
  async (val) => {
    let temp = 1;
    if (val) {
      // 首先将值转为数组
      const list = Array.isArray(val) ? val : [val];
      // 然后将数组转为对象数组
      let arr = list.map((item) => {
        if (typeof item === "string") {
          item = { name: item, url: item };
        }
        item.uid = item.uid || new Date().getTime() + temp++;
        return item;
      });
      fileList.value = arr;
    } else {
      fileList.value = [];
    }
  },
  { deep: true, immediate: true }
);

// 上传前校检格式和大小
function handleBeforeUpload(file) {
  // 校检文件类型
  if (props.fileType.length) {
    const fileName = file.name.split(".");
    const fileExt = fileName[fileName.length - 1];
    const isTypeOk = props.fileType.indexOf(fileExt) >= 0;
    if (!isTypeOk) {
      proxy.$modal.msgError(
        `文件格式不正确, 请上传${props.fileType.join("/")}格式文件!`
      );
      return false;
    }
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }
  proxy.$modal.loading("正在上传文件，请稍候...");
  number.value++;
  return true;
}

// 文件个数超出
function handleExceed() {
  // if (props.limit == 1) {
  //   handleDelete(fileList.value.length - 1);
  // }
  proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
}

// 上传失败
function handleUploadError(err) {
  proxy.$modal.msgError("上传文件失败");
}

// 上传成功回调
function handleUploadSuccess(res, file) {
  if (res.code === 200) {
    uploadList.value.push({ ...res.data });
    fileList.value.push({ ...res.data });
    if (props.directoryInputShow && fileName.value == "") {
      fileName.value = fileList.value[0].originalName || "";
    }
    uploadedSuccessfully();
  } else {
    number.value--;
    proxy.$modal.closeLoading();
    proxy.$modal.msgError(res.msg);
    proxy.$refs.fileUpload.handleRemove(file);
    uploadedSuccessfully();
  }
}

// 删除文件
function handleDelete(index) {
  fileList.value.splice(index, 1);
  emit("update:modelValue", fileList.value);
}

// 上传结束处理
function uploadedSuccessfully() {
  if (number.value > 0 && uploadList.value.length === number.value) {
    // fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value);
    uploadList.value = [];
    number.value = 0;
    emit("update:modelValue", fileList.value);
    proxy.$modal.closeLoading();
  }
}

// 获取文件名称
function getFileName(name) {
  // 如果是url那么取最后的名字 如果不是直接返回
  if (name.lastIndexOf("/") > -1) {
    return name.slice(name.lastIndexOf("/") + 1);
  } else {
    return name;
  }
}

// 对象转成指定字符串分隔
function listToString(list, separator) {
  let strs = "";
  separator = separator || ",";
  for (let i in list) {
    if (list[i].id) {
      strs += list[i].id + separator;
    }
  }
  return strs != "" ? strs.substr(0, strs.length - 1) : "";
}

//禁用名录文件名称修改input事件
function fileNameInput() {
  // if(!fileList.value[0]) {
  //   proxy.$modal.msgError('请上传资料！！！');
  //   fileName.value = '';
  //   return ;
  // }
  // let item = fileList.value[0];
  // fileList.value[0].originalName = fileName.value + "." + item.fileSuffix;
  emit("update:materialName", fileName.value);
}
</script>

<style scoped lang="scss">
.upload-file {
  width: 80%;
}
.upload-file-uploader {
  margin-bottom: 5px;
}
.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}
.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}
.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
.el-upload__tip {
  margin-left: 50px !important;
  margin-top: 0px;
}
</style>
